/*
 * Context.js
 * Copyright Jacob Kelley
 * MIT License
 *
 * Modified by Joshua Christman
 */

context = (function () {

	var options = {
		fadeSpeed: 100,
		filter: function ($obj) {
			// Modify $obj, Do not return
		},
		above: 'auto',
		left: 'auto',
		preventDoubleContext: true,
		compress: false
	};

	function initialize(opts) {

		options = $.extend({}, options, opts);

		$(document).on('click', function () {
			$('.dropdown-context').fadeOut(options.fadeSpeed, function () {
				$('.dropdown-context').css({display: ''}).find('.drop-left').removeClass('drop-left');
			});
		});
		if (options.preventDoubleContext) {
			$(document).on('contextmenu', '.dropdown-context', function (e) {
				e.preventDefault();
			});
		}
		$(document).on('mouseenter', '.dropdown-submenu', function () {
			var $sub = $(this).find('.dropdown-context-sub:first'),
				subWidth = $sub.width(),
				subLeft = $sub.offset().left,
				collision = (subWidth + subLeft) > window.innerWidth;
			if (collision) {
				$sub.addClass('drop-left');
			}
		});

	}

	function updateOptions(opts) {
		options = $.extend({}, options, opts);
	}

	function buildMenu(data, id, subMenu) {
		var subClass = (subMenu) ? ' dropdown-context-sub' : '',
			compressed = options.compress ? ' compressed-context' : '',
			$menu = $('<ul class="dropdown-menu dropdown-context' + subClass + compressed + '" id="dropdown-' + id + '"></ul>');

		return buildMenuItems($menu, data, id, subMenu);
	}

	function buildMenuItems($menu, data, id, subMenu, addDynamicTag) {
		var linkTarget = '';
		for (var i = 0; i < data.length; i++) {
			if (typeof data[i].divider !== 'undefined') {
				var divider = '<li class="divider';
				divider += (addDynamicTag) ? ' dynamic-menu-item' : '';
				divider += '"></li>';
				$menu.append(divider);
			} else if (typeof data[i].header !== 'undefined') {
				var header = '<li class="nav-header';
				header += (addDynamicTag) ? ' dynamic-menu-item' : '';
				header += '">' + data[i].header + '</li>';
				$menu.append(header);
			} else if (typeof data[i].menu_item_src !== 'undefined') {
				var funcName;
				if (typeof data[i].menu_item_src === 'function') {
					if (data[i].menu_item_src.name === "") { // The function is declared like "foo = function() {}"
						for (var globalVar in window) {
							if (data[i].menu_item_src == window[globalVar]) {
								funcName = globalVar;
								break;
							}
						}
					} else {
						funcName = data[i].menu_item_src.name;
					}
				} else {
					funcName = data[i].menu_item_src;
				}
				$menu.append('<li class="dynamic-menu-src" data-src="' + funcName + '"></li>');
			} else {
				if (typeof data[i].href == 'undefined') {
					data[i].href = '#';
				}
				if (typeof data[i].target !== 'undefined') {
					linkTarget = ' target="' + data[i].target + '"';
				}
				if (typeof data[i].subMenu !== 'undefined') {
					var sub_menu = '<li class="dropdown-submenu';
					sub_menu += (addDynamicTag) ? ' dynamic-menu-item' : '';
					sub_menu += '"><a tabindex="-1" href="' + data[i].href + '">' + data[i].text + '</a></li>'
					$sub = (sub_menu);
				} else {
					var element = '<li';
					element += (addDynamicTag) ? ' class="dynamic-menu-item"' : '';
					element += '><a tabindex="-1" href="' + data[i].href + '"' + linkTarget + '>';
					if (typeof data[i].icon !== 'undefined')
						element += '<span class="glyphicon ' + data[i].icon + '"></span> ';
					element += data[i].text + '</a></li>';
					$sub = $(element);
				}
				if (typeof data[i].action !== 'undefined') {
					$action = data[i].action;
					$sub
						.find('a')
						.addClass('context-event')
						.on('click', createCallback($action));
				}
				$menu.append($sub);
				if (typeof data[i].subMenu != 'undefined') {
					var subMenuData = buildMenu(data[i].subMenu, id, true);
					$menu.find('li:last').append(subMenuData);
				}
			}
			if (typeof options.filter == 'function') {
				options.filter($menu.find('li:last'));
			}
		}
		return $menu;
	}

	function addContext(selector, data) {
		if (typeof data.id !== 'undefined' && typeof data.data !== 'undefined') {
			var id = data.id;
			$menu = $('body').find('#dropdown-' + id)[0];
			if (typeof $menu === 'undefined') {
				$menu = buildMenu(data.data, id);
				$('body').append($menu);
			}
		} else {
			var d = new Date(),
				id = d.getTime(),
				$menu = buildMenu(data, id);
			$('body').append($menu);
		}

		//右键事件
		$(selector).on('contextmenu', function (e) {
			e.preventDefault();
			e.stopPropagation();

			rightClickEvent = e;
			currentContextSelector = $(this);

			$('.dropdown-context:not(.dropdown-context-sub)').hide();

			$dd = $('#dropdown-' + id);

			$dd.find('.dynamic-menu-item').remove(); // Destroy any old dynamic menu items
			$dd.find('.dynamic-menu-src').each(function (idx, element) {
				var menuItems = window[$(element).data('src')]($(selector));
				$parentMenu = $(element).closest('.dropdown-menu.dropdown-context');
				$parentMenu = buildMenuItems($parentMenu, menuItems, id, undefined, true);
			});

			if (typeof options.above == 'boolean' && options.above) {
				$dd.addClass('dropdown-context-up').css({
					top: e.pageY - 20 - $('#dropdown-' + id).height(),
					left: e.pageX - 13
				}).fadeIn(options.fadeSpeed);
			} else if (typeof options.above == 'string' && options.above == 'auto') {
				$dd.removeClass('dropdown-context-up');
				var autoH = $dd.height() + 12;
				if ((e.pageY + autoH) > $('html').height()) {
					$dd.addClass('dropdown-context-up').css({
						top: e.pageY - 20 - autoH,
						left: e.pageX - 13
					}).fadeIn(options.fadeSpeed);
				} else {
					$dd.css({
						top: e.pageY + 10,
						left: e.pageX - 13
					}).fadeIn(options.fadeSpeed);
				}
			}

			if (typeof options.left == 'boolean' && options.left) {
				$dd.addClass('dropdown-context-left').css({
					left: e.pageX - $dd.width()
				}).fadeIn(options.fadeSpeed);
			} else if (typeof options.left == 'string' && options.left == 'auto') {
				$dd.removeClass('dropdown-context-left');
				var autoL = $dd.width() - 12;
				if ((e.pageX + autoL) > $('html').width()) {
					$dd.addClass('dropdown-context-left').css({
						left: e.pageX - $dd.width() + 13
					});
				}
			}
		});
	}

	function destroyContext(selector) {
		$(document).off('contextmenu', selector).off('click', '.context-event');
	}

	return {
		init: initialize,
		settings: updateOptions,
		attach: addContext,
		destroy: destroyContext
	};
})();

var createCallback = function (func) {
	return function (event) {
		func(event, currentContextSelector, rightClickEvent)
	};
};

var currentContextSelector = undefined;
var rightClickEvent = undefined;
